Gold Recovery From Graphic IC Chips
Graphic ic chips have a large quantity of gold. And this plays a major role in E-waste recycling.When any scraper buys electronics scrap. His eyes always search for graphic ic chips(Green IC Chips).
It has two parts:
- Black silicon (upper part)
- fiber (lower part)
The main part is upper part and 95% gold is in it. I like to recycle it separately. First separate upper part of graphic c chips. You can see this in the picture. I will make another tutorial about recycling of lower part. So keep it store for your yearly profit.
For recycling of graphic ic chips, we shall need these things.
- Sulfuric Acid (H2SO4)
- Nitric Acid (HNO3)
- Hydrochloric Acid (HCL)
- Sodium Metabisulfite (SMB)
- Filter Paper
- Stainless Steel Pot
The method of recycling green ic chips is nearly same as surface mount ic chips. Gold recovery from graphic ic is easier than surface mount ic chips. Because the material of graphic ic chips (green ic) is so friendly to dissolve in sulfuric acid. If you are new in ic chips recycling then i will recommend you try graphic ic chips first.
If you don’t watch Surface Mount IC Chips tutorial then first watch that. Simply, Dissolve graphic ic chips in sulfuric acid. After this, wash and remove base metals with nitric acid. Then, dissolve gold wires in aqua regia. Filter gold solution and precipitate gold with sodium metabisulfite. If you want more about this you can visit surface mount ic chips tutorial by click here. Stay in touch because coming next tutorials are very useful for you.